Sportsman II 64 Straight 200 Iron Cylinder Heads Street

Description

Combustion chambers available in 64cc, The rocker cover rails are fully machined, Available with either angle, or straight spark plugs, Engineered to provide 30-70 horsepower gains over OEM heads, Features a higher, wider, raised roof intake runner with improved short turn radius
Sportsman II 64 Straight 200 Iron Cylinder Heads Street
Sku # 8241122-STRT
Mfr. Part # 8241122-STRT
Condition
New
Brand
World Products
Sold
Pair
Details
Notes
Head Flow
@ .600 Lift
245 intake, 165 exhaust (Super Flow 1050)
260 intake, 176 exhaust (Super Flow 600)
All heads flowed with a standard .750" intake plate, without exhaust tube, and 28" of water.
Info
The industry’s most popular true high performance cast iron cylinder head has been continuously improved since its introduction over 20 years ago. With 200cc intake and 69cc exhaust ports, World’s Sportsman II heads offer 30-70 horsepower gains over OEM heads, yet are 50-state emissions legal.
Bolt on from 30 to 70 additional H.P. (Dyno Proven)
Combustion chambers available in 64cc
Available with either angle, or straight spark plugs
200cc intake runners
Fully machined rocker cover rails
Higher, wider, raised roof intake runner with improved short turn radius
50-State Emissions legal
Recommended spark plug is a 14mm-5/8", .460" reach with a tapered seat
STRT assembly: Valve springs suitable for Hydraulic lifter cams up to 0.550" lift (includes spring # 180-671515)
FLAT assembly: Valve springs suitable for Solid lifter cams up to 0.650 lift (includes spring # 915-99893)
RACE assembly: Valve springs suitable for Solid Roller cams up to 0.680" lift (includes spring # 915-99876)
Sportsman II Application Chart (GIF)
Please specify cam lift in comments section when ordering heads.
Assembled heads are built to order.
Item Details
Straight Plug, 64cc Chambers
Specs
Casting ID Number: I-037
Material: High density cast iron
Valve Seats: Intake (integral), exhaust (hardened)
Valve Guides: Integral cast iron
Spring Seats: Machined for 1.560" and 1.250"
Valve Diameter: 2.020"" intake, 1.600" exhaust (11/32" stem)
Rocker Arm Studs: Screw-in style
Rocker Arms: 1.5 ratio (use of 1.6 ratio will require elongation of pushrod holes)
Intake Runner: 200cc, standard port location
Exhaust Ports: 69cc, standard location
Combustion Chamber: 64cc, straight or angled plug orientation
Spark Plug: 14mm 5/8" .460" reach tapered style
Valve Job: Multi-angle intake and radiused exhaust
Valve Cover Rail: Raised w/ perimeter and center bolt pattern
Valve Angle: Stock 23°
Accessory Bolt Holes: Stock
Charts
(PDF)
Specs
Sold in Quantity
Pair
Finish
Natural
Cylinder Head Style
Assembled
Spark Plug Style
Straight
Material Type
Cast Iron
Combustion Chamber Volume
64cc
Intake Port Shape
Rectangle
Exhaust Port Shape
Square
Intake Valve Diameter
2.020
Exhaust Valve Diameter
1.600
Intake Runner Volume Range
200cc - 209cc
Combustion Chamber Volume Range
60cc - 69cc
Intake Runner Volume
200cc
Reviews
3 days from starting motor , can't wait
Rated
by Show var on April 02, 2020
Summary:
Matches square gaskets nicelu
Yes, I recommend this product.
Performance
Rated
by Turtle on February 12, 2019
Summary:
They said it will give me 30 to 70% more horsepower right out of the box, it remains to be seen! Came with guide plates, and stainless steel valves for regular unleaded gas. At least I hope so! Springs already installed with the valves, retainers and locks.
Cons:
Costs kinda high!
Pros:
Complete head assembly
Yes, I recommend this product.
The best cast iron heads out of the box!
Rated
by Moose413 on October 28, 2017
Summary:
The World Products Sportsman heads, right out of the box make more power, even better gas mileage, are better than any GM stock heads ever made! It's a difference you can feel in the seat of your pants! If you're running just a mild cam (you want some performance AND gas mileage), why spend big bucks on some aluminum heads when dollar for dollar, these heads will out perform the others by a long shot?!? But if you're after more serious, yet streetable power, You get even more response with bigger cams. These heads will embarrass the old "Feulie" heads Chevy made!
Pros:
All the stock bolt holes are there for your acce
Yes, I recommend this product.
Related Items / Suggested Parts
Dart 10320010P Iron Eagle Bare Chevy Cylinder Head, Straight, 200/64cc
Dart Iron Eagle Assembled Chevy Heads, Straight Plug, 200cc/64cc
World Sportsman II Small Block Chevy Iron Heads, Angle Plug
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Speedway Motors is America’s Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 69 years. Founded in 1952 by “Speedy” Bill Smith – a racer and street rodder himself – Speedway has grown from a one-man operation to become the world’s largest manufacturer, distributor and retailer of street rod and racing products. Our industry-leading fast delivery is the result of same-day shipping from our state-of-the-art, centrally located 500,000 sq. ft. headquarters. Speedway’s size offers customers unmatched product selection and low pricing, while our excellent technical support and customer service have made us a recognized leader in the rodding and racing industries.
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